Corrosion resistance of heparin/montmorillonite coating on biomedical magnesium alloy

被引：0
|
作者：
Tian J.-R. [1 ]
Li H. [1 ]
Zou Y.-H. [1 ]
Zeng R.-C. [2 ]
机构：
[1] College of Chemical and Biological Engineering, Shandong University of Scicnce and Technology, Qingdao
[2] College of Materials Science and Engineering, Shandong University of Scicnce and Technology, Qingdao
来源：
Surface Technology | 2021年 / 50卷 / 02期
关键词：
Biomaterial; Corrosion resistance; Heparin; Magnesium alloy; Montmorillonite;
D O I：
10.16490/j.cnki.issn.1001-3660.2021.02.008
中图分类号：
学科分类号：
摘要：
To solve the problems such as vascular endothelialization and restenosis caused by magnesium alloy stent, this study aims to prepare heparin (HS)/montmorillonite (MMT) coating with anticoagulant properties on biomedical magnesium alloy and investigate its corrosion resistance. Sodium montmorillonite (Na-MMT) coating was prepared on the surface of AZ31 magnesium alloy by hydrothermal method; and then HS/MMT composite coating was prepared by immersion method. The coating was characterized using scanning electron microscopy (SEM), Fourier infrared spectroscopy (FT-IR) and X-ray diffractometry (XRD). The corrosion resistance of the coating was investigated by means of electricchemical analysis and hydrogen evolution rate measurement. The results showed that the prepared HS-MMT coating was uniform and compact, with coating thickness of 41 µm. The basic elements of montmorillonite and N, S were found in the EDS analysis diagram of HS-MMT coating, and the characteristic peaks of heparin and montmorillonite were found in the FT-IR and XRD images of the coating. Compared with the AZ31 magnesium alloy, the free corrosion potential of HS-MMT coating was increased up to 0.29 V; corrosion current density was decreased by two orders of magnitude; and the average hydrogen evolution rate was 0.016 mL/(cm·h), only 18% of the AZ31 substrate. Therefore, the HS-MMT coating has good corrosion resistance, providing a new scheme for magnesium alloy vascular stents. © 2021, Chongqing Wujiu Periodicals Press. All rights reserved.
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页码：66 / 73
页数：7
相关论文
共 44 条
  • [21] Wang J.K., Zhao L.L., Liu W.J., Et al., Hemostatic effect of montmorillonite powder in rats of liver hemorrhage model[J], Jiangsu Medical Journal, 44, 5, pp. 484-487, (2018)
  • [22] Yin Z.Z., Qi W.C., Zeng R.C., Et al., Advances in coatings on biodegradable magnesium alloys[J], Journal of magnesium and alloys, 1, pp. 42-65, (2020)
  • [23] Zeng R.C., Kong L.H., Chen J., Et al., Research progress on surface modification of magnesium alloys for medical applications[J], The Chinese journal of nonferrous metals, 21, 1, pp. 35-43, (2011)
  • [24] Ding Z.Y., Cui L.Y., Zeng R.C., Et al., Recent development of self-healing coating on magnesium alloys: A review[J], Surface technology, 48, 3, pp. 1-9, (2019)
  • [25] Zhang Z.Q., Zeng R.C., Lin C.G., Et al., Corrosion resistance of self-cleaning silane/polypropylene composite coatings on magnesium alloy AZ31[J], Journal of materials science & technology, 41, 6, pp. 43-55, (2020)
  • [26] Fan X.L., Li C.Y., Wang Y.B., Et al., Corrosion resistance of an amino acid-bioinspired calcium phosphate coating on magnesium alloy AZ31[J], Journal of materials science & technology, 14, pp. 224-235, (2020)
  • [27] Liu H.P., Cui L.Y., Han Z.Z., Et al., Corrosion resistance of a magnesium hydroxide/stearic acid composite coating fabricated by vapor diffusion method on Mg-Li-Ca alloy [J], Journal of aeronautical materials, 39, 1, pp. 26-37, (2019)
  • [28] Shao Y., Zeng R.C., Li S.Q., Et al., Advance in antibacterial magnesium alloys and surface coatings on magnesium alloys: A review[J], Acta metallurgica sinica, 33, 5, pp. 615-629, (2020)
  • [29] Cui L.Y., Wei G.B., Han Z.Z., Et al., In vitro corrosion resistance and antibacterial performance of noveltin dioxide-doped calcium phosphate coating on degradable Mg-1Li-1Ca alloy[J], Journal of materials science & technology, 3, pp. 254-265, (2019)
  • [30] Yang Y.X., Fang Z., Liu Y.H., Et al., Biodegradation, hemocompatibility and covalent bonding mechanism of electrografting polyethylacrylate coating on Mg alloy for cardiovascular stent[J], Journal of materials science & technology, 46, 11, pp. 114-126, (2020)
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